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  1. J

    3DHS 48" vyper

    Hi GYRO / Snowdog/ Yowzilla, I am getting back with you after having several rounds of email with Aaron from 3DHS. They don't sell the fuselages separately for 48" Vypers. His guess about my crash was a snap on the downline pullout, but not sure why. Could have been local turbulence or a...
  2. J

    3DHS 48" vyper

    I tried responding to the last post a couple times and the messages don't seem to go through.. Lets see if this gets posted... basically, I will keep trying to get a fuse from 3DHS. I also need to review the downline hazards of stalling from Scott's book.. Maybe try to contact him to get...
  3. J

    3DHS 48" vyper

    I had tried moving the CG from being more nose-heavy back to the recommended (nose heavy) setup for sport flying.. I thought it might help the KE flight but I had not tried KE yet.. The wind was 10-12 mph and was on my 2nd battery and hadn't tried to see how the KE would do yet.. I still...
  4. J

    3DHS 48" vyper

    Hi Gyro & Snowdog, I finally got out to fly today after being under the weather for a few weeks. I was doing some hammerheads and humpty dumpty's and probably didn't have enough airspeed at the bottom or just pulled out a little too steep and tip-stalled it into the ground. It happened so...
  5. J

    3DHS 48" vyper

    Yowzilla, Thanks for your inputs on LiPo brands. The Thor's seem to be out of stock but are about the same prices as the Glacier's. What you said about keeping the batteries at storage voltage except for right before you fly is what the racing guy at our field said. He charges batteries on...
  6. J

    3DHS 48" vyper

    Hey SnowDog, The KE on Realflight is fairly easy to do using high rates. I still dork it in after a couple minutes of flying back and forth, but it is getting easier. I like the Yak-54 (ED), and PAU 36% Edge 540 in RF7. The next time I go to the field, I will set the CG a littler further back...
  7. J

    3DHS 48" vyper

    I took a few more measurements on my 48" Vyper. All-up weight w 2.2aH 4S battery: 52.5oz. w/o battery: 43.7oz. (I had to add nose weight after choosing push-pull rudder servo placement.) I have moved CG about 1/8" more forward than the 110mm sport/pattern recommendation from the manual. This...
  8. J

    3DHS 48" vyper

    SnowDog, I' just measured my rudder throw. On low rates, the throws are only 1 3/4" in each direction as measured near the top of the rudder. Full rates are about 3" each way.. (1 cm from touching elevator). Should 1 3/4" be enough on low rates or should I increase to maybe 2.25"? I've only...
  9. J

    3DHS 48" vyper

    Gyro I charged up a 35C 4S nanotech pack at 70F. and see 5,5,7,5 total 22mOhm for the pack. If you are seeing 3 to 4 mOhm per cell on the Glacier packs that is impressive. If they last longer and don't puff, it may be worth an extra 50% of the nanotech price, especially if they don't puff in...
  10. J

    3DHS 48" vyper

    Hi GYRO, Here is the battery data I wanted to compare with your Glacier batteries: Here is what the Icharger measures for internal impedance of the new 4S 35C Nano-techs I am using for the 48" Vyper measured at 13C. (55.4F). Measured at storage V (3.85v). These batteries only have 3-4...
  11. J

    3DHS 48" vyper

    Hi Gyro & SnowDog, Thanks for the advice on LiPo brands! I may have to try the Glacier batteries when I need new 4S (Vyper) or 3S (SHP) ones. The Nano-tech 4S 35C's are 4 for $88 from the US warehouse. The Glaciers are 3 for $100. They have to be good if you are paying 50% more for them than...
  12. J

    3DHS 48" vyper

    Hey SnowDog, How do you get any Amps out of your LiPo's with those low temperatures? Do you pre-warm them before flying? Also, what 6S batteries do you use for the big Vyper? I had one of my two 6S Nanotech's get a bad cell in it and I think it is ruined.. Only flew probably 20 flights on...
  13. J

    3DHS 48" vyper

    I haven't been, but sometimes there are swap-meets in San Marcos (half way?. I think the old Extra 260 that someone sold me was from that swap-meet.. It may have been from someone getting rid of it in your club! Nice to meet you.
  14. J

    3DHS 48" vyper

    Hey Gyro, have you ever been to our HCAM flying field (off of Slaughter, not far from I35)? I did not get your name, you may be a member of HCAM for all I know..
  15. J

    3DHS 48" vyper

    Nice to meet you. I live in Austin and am part of the HCAM (Hill Country Aereomodelers) flying club here. I started my instruction with an Avistar, 46AX, saw someone fly an SHP and had to have one. It is still flying with a Jack-in-the-box head on a servo for my step-grandkids. I trashed...
  16. J

    3DHS 48" vyper

    Just registered on this forum today.. anyone flying 48" super vypers this winter?
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